Fitbnace



April 15, 1924. 1,490,846

J. NORBECK FURNACE Filed Feb. 19. 1923 s Sheeis-Sheet 1 Irwenior: Jacob JYorbcck 1,490,846 J. NORBECK FURNACE April 15, 1924.

Filed Feb. 19. 1923 '3 Sheets-Sheet 2 El 32s Im/eiii'o r: Jacob JY'orZeek Afiril 15, 1924.

J. NORBECK FURNACE Filed Feb. 19. 1923 3 Sheets-Sheet 3 FIG. 8.

I 71116 47 Jacofi Jorb'ec/G Patented Apr. 15, 1924.

JACOB NOBBECK, OF PHILADELPHIA, PENNSYLVANIA.

FURNACE.

Application filed Fcbruaiy 19, 1923. Serial No. 619,913.

To all wizom it may concern:

Be it known that 1, Jason NoRnncK, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful improvements in Furnaces of which the following is a specification.

This invention relates to improvements in furnaces for burning bone, fullers earth and analogous substances.

The primary object of the invention is to provide a furnace of novel. simple and etticicnt construction in which the material to be burnt may pass through the furnace in a manner to permit the heat to act upon such material more effectively than in prior furnaces, resulting in increased capacity. Another object of the invention is to provide a novel and efficient means for cleaning the fines for the products of combustion leading from the combustion chamber; and a further object is to provide novel and advantageous means to regulate the feeding of the material through the furnace.

With the foregoing and related objects in view, the invention consists in the novel construction, combination and arrangement of parts hereinafter described and claimed.

In the accompanying drawings, illustrating the invention,

Figure 1 is a front elevation of a furnace embodying my invention.

Figure 2 is a side elevation thereof.

Figures 3 and 45 are vertical sections through the furnace on lines 3--3 and 44 of Figs. 1 and 3, respectively.

Figures 5 and 6 are horizontal sections through the furnace on lines 55 and 6-6, Fig. 3.

Figure 7 is a vertical section through the combustion chamber, on line 7-7 of Fig. 3.

Figure 8 is an enlarged section of one end of the device for regulating the feeding of the material to the combustion chamber.

Figure 9 is a horizontal section through one of the chimneys showing the damper therein, on line 9-9 of Fig. 10.

Figure 10 is a vertical section through the parts shown in Fig. 9, on line 1()-10 of Fig. 9.

Referring to the drawings, the body of the furnace is formed of suitable brick work which encloses a combustion chamber 12 in the lower portion thereof, a heating chamber 13 above the combustion chamber 12, two

sets of separate heating passages 14, extending upwardly from the chamber 13, and a hopper 15 above the passages 1st.

The back wall 16 of the combustion and heating chambers 12 and 13 is inclined rearwardly and upwardly, as clearly shown in Fig. 3. Opening into the forward portion 17 of the combustion chamber 12 near the bottom thereof is a fuel burner 18 which is directed toward the back wall 16. The burn or 18 is supplied with gas or other suitable fuel through a pipe 19 connected thereto. interposed between the burner 18 and the back wall16 is a battle wall 20 which extends upwardly from the bottom 21 a short distance in spaced relation to the burner 18 and back wall 16. The wall 20 is formed of suitable brick worr and it is provided with scattered openings 22 extending horizontally therethrough for the passage of flame from the burner. The wall 20 acts as a baffle for the flame to distribute it over the combustion chamber 12 and over an extended area of the inclined back wall 16. The bottom of the furnace is provided with a narrow vertical passage 23 disposed between the back wall 16 and the baffle wall 20, through which the burnt material may discharge.

The inclined back wall 16 of the chamber 12 extends rearwardly and upwardly and forms one side of the bottom of the heating chamber 13. The other side of the bottom of the heating chamber 13 is formed by an inwardly extending wall 25 which also forms the top of the combustion chamher 12. The upper surfaces of the walls 16 and 25 of the heating chamber 13 converge toward the bottom of the same, and the wall 25 terminates before meeting the wall 16, providing an opening or passage 26 through which the burnt material may pass from the heating chamber 13 into the combustion chamber 12.

The two sets of passages 14 are formed between a central wall 27 and outer walls 28 and 29. The central wall 27 has oppositely arranged, laterally extending portions 30 forming outwardly and downwardly inclined bottom surfaces 31, for said passages 14. Each of the outer walls 28 and 29 have oppositely arranged, inwardly extending portions 32 and 33; the portions 33 having surfaces 34: downwardly and inwardly in clincd toward the central wall 27.

The inwardly extending portions 32 and 33 of the outer walls 28 and 29 are disposed ill) above the respective inclined surfaces 31 and the under surfaces of said portions 32 and 33, which are in the form of a series of stepped arches 35, are inclined upwardly and inwardly over the surfaces 81; the stepped arches providing heat deflecting surfaces above said inclined surfaces 31.

The granulated particles of the material to be burnt are fed from the hopper 15 into the upper ends of the upper passages 14; and the feeding of the material is controlled by two valve devices 36, one for each passage. Each valve device 36 includes a horizontal cylinder 37 fixed between the bottom portion of one of two downwardly converging, inclined walls 38 forming the bottom of the hopper, and the central wall 27 which extends a slight distance up into the hopper 15. Fitted within each cylinder 37 is a longitu dinally slidable cylinder 39having at one end a projecting arm 40 connected to a long lever arm 41, whose upper end is fulcrumed on a bracket 42 projecting from the wall of the furnace. The lower end portion of each lever 41 extends through a guiding bracket 48 and is provided with a suitable handle 44 by means of which the lever may be operated to move the inner cylinder 39 longitudinally within the outer cylinder 37. The top and bottom walls of the two cylinders 37 and 39 are provided with longitudinal rows of perforations; relatively arranged, so that longitudinal movement of the inner cylinder will bring said perforations into and out of registry; permittingthe material within the hopper 15 to feed by gravity therefrom and into thepassages 14, when the perforations are in registry, and stopping the feeding of the material when the perforations are out of registry. lit will thus be seen that the supply of material from the hopper 15 to the passages 14 may be started and stopped and regulated by operating the levers 41 to move the inner cylinders 39 within the outer cylinders 37.

The structure is provided with two fines 45 which communicate at their inner ends with the upper ends of the passages 14, and extend outwardly therefrom beneath the hopper 15 and terminate at their outer ends in expanded cleaning boxes 46 which are supported by suitable I-beams carried by the brick work of the furnace. Rising from and communicating with each cleaning box 46 is a chimney 47 which is provided with a suitable damper 48 which may be adjusted to regulate draft within the chimney. EX- tending downwardly from and communicating with the boxes 46 are pipes 49 which are supported by suitable brackets 50 extending outwardly from the brick work of the furnace. The upper ends of the pipes 49 are normally closed by suitable slide plates 51 which may be drawn outwardly to open communication between the boxes 46 and pipes 49 for cleaning purposes, and which may be moved inwardly to close the upper ends of the pipes 49 to prevent air from entering the boxes 46 through the pipes 49 when the furnace is in operation.

The side walls of the flues 45 and cleaning boxes 46 have openings normally closed by suitable doors 52 and 53 and through which access may be had to the Hues and boxes for cleaning soot and dirt therefrom. lVhen the fines and boxes are cleaned, the plates 51 may be moved to uncover the upper ends of the pipes 49 and the soot and dirt may be pushed into the pipes 49 through which they will descend and may be caught in any suitable receptacles placed beneath the lower ends of the pipes.

The outer walls 28 and 29 have openings adjacent to the lower ends of the respective sets of passages 14 which are normally closed by suitable doors 54 and 55, respectively, and through which access may be had to said passages for cleaning and other purposes.

The front wall 56 of the combustion chamber 12 has a peep hole 57 therein which is normally closed by a hinged plate 58; and the wall 56 has another opening 59 therein through which fire may be applied to the burner 18 to ignite the fuel issuing therefrom. The opening 59 is normally closed by a hinged plate 60.

The walls 27, 28 and 29 and their projections 30, 32 and 33, provide zigzag channels, as shown in Fig. 3, which include the passages 14. By reason of the inclined surfaces 31 and 34, material fed from the hop per 15 will gravitate through said zigzag channels; passing from the upper inclined surfaces 31 first receiving the same to the inclined surfaces 84, thence to the lower inclined surfaces 31, of the lower passages 14, and dropping from the latter onto the converging walls 16 and 25 forming the bottom of the heating chamber 13. From said heating chamber the material passes to. and through the opening 26 into the combustion chamber 12 and then on down over the inclined surface of the back wall 16 of the heating and combustion chambers to and tl'irough the discharge passage 2-3 at the bottom of the furnace. From the passage 23, the material falls into any suitable receptacle placed beneath it.

The operation of the furnace, briefly described, is as follows:

The material to be burnt is placed within the hopper 15, fuel is supplied to the burner 18 and ignited within the combustion chamber 12, and the valve devices 36 are opened to permit the desired quantity of material within the hopper to flow continuously down through the zigzag channels, including the passages 14, heating chamber 13, and combustion chamber 12, as previously described. The heat and products of combustion pass from the combustion chamber 12 up through the heating chamber 13 and passages l l, out through the tines 45 and boxes 46 and up through the chimneys 47. The heat and products of combustion pass through and act upon the material descending from the hopper 15 through the zigzag channels of the furnace as it passes by gravity from one inclined surface to another, in a manner to quickly and thoroughly burn the same; which operation is materially assisted by the stepped arches 35, which direct the heat against the material flowing over the inclined surfaces 31.

The invention is particularly useful in oil refineries for reclaiming fouled fullers earth or bone particles by burning out the oil accumulated therein during oil filtering operations. Also for burning the green fullers earth or bone particles before it has been used for filtering purposes.

The invention is also useful for burning bone particles and fullers earth used in sugar refineries.

I claim l. A furnace structure having a combustion chamber, outer walls extending above said combustion chamber, a wall centrally disposed with respect to and spaced from the outer walls and providing two separate channels in communication with the com bustion chamber; the latter being disposed below the central wall and each of said channels being formed in part by outwardly and downwardly inclined portions of the central wall and inwardly and downwardly inclined portions of the outer walls, flues leading from the upper portions of the channels, and a fuel burner communicating with said combustion chamber.

2. A furnace structure having a combustion chamber in the lower portion of the same, a fuel burner communicating with said combustion chamber, outer walls extending above said combustion chamber, a central wall spaced from a pair of said outer walls and disposed above said combustion chamber; said central wall having oppositely disposed projecting portions with outwardly and downwardly inclined surfaces providing with a pair of said outer walls two separate channels in communication with the combustion chamber, and each of said channels being formed in part by an outwardly and downwardly inclined portion of the central wall and an inwardly downwardly inclined portion of one of said outer walls, and horizontal lines leadfrom the upper ends of said channels.

3. A furnace stru ture comprising a plurality of enclosing walls having a combustion chamber in the lower part of the same, a fuel burner communicating with the combustion chamber, a heating chamber above the combustion chamber having downwardly and inwardly converging bottom walls spaced apart at the bottom of the heating chamber to provide an opening afford-- ing communication between the chambers, a central wall rising above said heating chamber, two separate channels formed by diverging portions of said central wall on one side and inwardly and downwardly inclined portions of a pair of the enclosing walls on the other side extending upwardly from and communicating with the heating chamber, means for supplying material to be burnt to the upper portion of said channels, and lines leading from the upper portion of said channels.

4. A furnace structure having a combustion chamber in the lower part of the same, a fuel burner communicating therewith, a heating chamber above the combustion chamber, a channel discharging into said combustion chamber formed by diverging upwardly and downwardly inclined walls on one side and a downwardly inclined wall on the other side, means for supply ing material to be burnt to the upper portion of said channel, and a flue leading outwardly from the upper portion of said channel.

5. A furnace structure having a combustion chamber in the lower part of the same, a fuel burner communicating therewith, two separate zigzag channels extending upwardly from and discharging into said combustion chamber and having lower diverging portions communicating with a chamber having converging bottom walls opening from said combustion chamber, means for supplying material to be burnt to the upper por tion of said channels, and horizontal flues leading outwardly from the upper ends of said channels.

6. A furnace structure having a combustion chamber in the lower part of the same, a fuel burner communicating with said combustion chamber, a channel within said furnace discharging into said combustion chamber and being formed in part by upwardly and downwardly inclined diverging walls on one side thereof and a downwardly inclined wall portion on the other side thereof; said upwardly inclined diverging wall hav ing stepped portions providing deflecting surfaces for directing the heat toward the downwardly inclined wall portion beneath the same, means for supplying material to be burnt to the upper portion of said channel, and a flue leading from the upper portion of said channel.

7. A furnace structure having a combustion chamber in the lower part of the same, two separate zigzag channels extending up wardly from said chamber and having a common terminal portion with downwardly converging walls disposed above and in communication with said combustion chamber, horizontally disposed flues leading outward- 1y from the upper ends of said channels, cleaning boxes having normally closed cleaning openings therein at the outer ends of said flues, chimneys in communication with and rising upwardly from said cleaning boxes, means for supplying material to be burnt to the upper portions of said chan nels, and a fuel burner communicating with said combustion chamber.

8. A furnace structure having a combustion chamber in the lower part of the same, a fuel burner communicating with said combustion chamber, a central wall disposed above said combustion chamber and having projecting portions which form with appropriately shaped projections of the outer walls two zigzag channels extending upwardly from said combustion chamber; said zigzag channels having terminal portions communicatingwith each other through said combustion chamber, fines leading from the upper portions of said channels, cleaning boxes at the ends of said fiues, chimneys in communication with said cleaning boxes and rising therefrom, cleaning pipes depending from said cleaning boxes, and means for supplying material to be burnt to the upper portions of said channels.

9. A furnace structure having a combustion chamber in the lower portion of the same, a fuel burner in communication with said combustion chamber, outer walls extending above said combustion chamber, a central wall spaced from the outer walls and disposed directly above said combustion chamber; said outer walls havin inwardly projecting portions with upwardly and downwardly diverging inclined surfaces and said central wall having oppositely disposed projecting portions with outwardly and downwardly inclined surfaces arranged between the upwardly and downwardly diverging inclined surfaces of the inwardly projecting portions of said outer walls and forming therewith two separate zigzag channels in communication with the combustion chamber, flues leading upon the upper ends of said channels for the passage of the productsof combustion, and means for feeding material to be burnt to said channels.

10. A bone burning furnace comprising a structure having a central wall with outwardly projecting portions having inclined surfaces and outer walls with iirwardly projecting portions also having inclined sur faces and forming with the inclined surfaces of the central wall projections a pair of zigzag channels, a combustion chamber disposed below said central wall, a burner structure in communication with said combustion chamber; the latter having the inner face of its rear wall inclined upwardly and away from said burner structure, and a wall having an inclined surface projecting toward the inclined face of the said combustion chamber and providing with the latter a space into which both streams of material flowing from said channels may converge for final discharge.

In testimony whereof I affix my signature hereto,

JACUBNORBECK. 

